Unusual circumstances
Unusual circumstances means (1) The need to search for and collect the requested records from field facilities or other establishments that are separate from the office processing the request; (2) The need to search for, collect, and appropriately examine a voluminous amount of separate and distinct records demanded in a single request; or (3) The need for consultation, which will be conducted with all practical speed, with another agency having a substantial interest in the determination of the request or among two or more components of the NRC having substantial subject-matter interest therein.